Variable Power Supplies circuit using 2N3906, LM317, LM337, LM324, MJ2955, 7805, 2N3055, 2N3905

Variable Power Supplies

Variable Power Supplies

Parts:

P1_500R

P2_10K
R1,R2_2K2
R3_330R
R4_150R
R5_1R
C1_3300µF
C2_1µF
D1,D2_1N5402
D3_5mm
Q1_BC182
Q2_BD139
Q3_BC212
Q4 _2N3055
T1_220V Primary,

variable power supplies

variable power supplies

Variable Power Supplies

Variable Power Supplies

Variable Power Supplies

Variable Power Supplies

Variable Power Supplies

Variable Power Supplies

Variable Power Supplies

Variable Power Supplies

Variable Power Supplies

Variable Power Supplies

This Variable Power Supplies circuit has a current limit feature, in case there is a short circuit or other problem places. Here’s a circuit for a fairly simple variable output.